01 - Preheat oven to 375°F. Line a baking sheet with parchment paper and set aside.
02 - Unroll the refrigerated pie dough. Using a 2.5-inch round cutter, cut out 12 circles from the dough.
03 - Gently press each dough circle into the wells of a mini muffin tin, forming small pastry cups that conform to the tin shape.
04 - Spoon approximately 1 tablespoon of cherry pie filling into each pastry cup, distributing evenly among all 12 wells.
05 - Lightly brush the exposed pastry edges with beaten egg using a pastry brush. This step is optional but promotes golden browning.
06 - Combine granulated sugar and ground cinnamon in a small bowl, mixing until thoroughly incorporated.
07 - Evenly sprinkle the cinnamon sugar mixture over the tops of all the cherry pie bites.
08 - Bake for 13 to 15 minutes until the pastry turns golden brown and the cherry filling becomes bubbly.
09 - Allow the bites to cool in the muffin tin for 5 minutes. Carefully transfer to a wire rack and cool completely before serving.